Gas-engine.



H. H- CUTLER.

GAS ENGINE.

APPLICATION FILED Junin, uns.

L23 L.. Patented June 26, 1917.

4 SHEETS-SHEET l.

H. H. BUTLER.

GAS ENGINE.

APPLICATION FILED JUNE I7. 1915. Lhm Patented June 26, 1917.

4 SHEETS-SHEET 2.

Patented June 26, 1917.

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H. H. CUTLER.

GAS ENGINE.

` APPLICATION FILE JUNE I7, 1915- LBLU.,

4 sHEETsLsHEET 4.

Patented June 26, 1917.

narran salaire HENRY H. oUTLnia, or MrLwaUi-knn'wrsoonsin.

GAS-ENGINE.

Specification of Letters latent.

Patented June 2d, 191'?.

. Application iled J' une 17, 1915.- Serial No'. 34,599.

To all whom z' may concern.'

Be it known that l, HENRY H. CUTLER, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Gras-Engines, of which the Yfollojving is a full, clear, concise, and exact description, reference being had to the' accompanying drawing, forming av part of this specification.

My invention relates to improvements in explosive engines and has for one of its ob- `jects-to provide means for more eiiciently 'une b-b or rig. 1;

Figs. 4, 5, 6 and 7 are diagrammatic views illustrating thev relativepositions of the engine cylinder pistons and the scavenging pistons.

Fig. 8 is a detail side elevation of the scavenging pistonoperating mechanism; and

. Fig. 9 is a sectional view on, the line c--c of Fig; l.

ln the embodiment illustrated, the engine is provided with. four cylinders, 1, 2, 3, 4,

which are lof the usual construction and are mounted above the crank casing 5. crankxcasing is of the usual construction and provides a casing and bearings for the crank shaft G'of the engine, which shaft is connected by means of piston rods 7 with the pistons 8 of the respectivecylinders. These cylinders are all provided with radiating ribs 9, as is usual, and surroundingeach cylinder is a casing or jacket 10, opened at its upper end 11 and also opened at its v lower end 12. This jacket extends below the inclosing casing 13, at the rear end of which is arranged the usual cooling fan, the air being drawn in through the opening 11 and out through the rear of the casing 13 by the fanA attached to the fly Wheel of the engine., Mounted on the'top of each, cylinder is a combustion chamber 14 which, in effect, is a horizontally disposed cyllnder This having radiatingribs 15' arranged thereon,

as is the case with the engine cylinders, and havmg operating therein a scavenging 4piston 16. The in-take valves 17 and the exhaust valves 18 of veach cylinder of the engine are disposed in the front of the combustion chamber 14. These valves, as shown, are horizontally mounted and are" of the usual construction, being closed under the influence of coiled springs 19 interposed between collars 20 on the ends thereof and collars 21 secured in the head of the cylinder 14. These valves are operated from the cam shaft 20'?, havingoperating cams 21,a thereon, between which and the ends of the stems 22 ofthe valvesare movable bearing members 23.

The scavenging pistons 16 are connected by piston rods 24:' with rocking crank shafts 25, 26 and 27; that is, the scavenging piston of cylinder 1 Iis connected with the crank vshaft 27; the scavenging piston of cylinder LLis connected with the crank shaft 26, the cranks on these respective shafts being idisposed at an angle of 150 degrees. 'The scavenging pistons of cylinders 2 and 3 are connected with the crank shaft 25, two

' cranks being formed on this shaft and being disposel at an. angle of 150 degrees. The crank shafts 27 and 26 are inter-connected by an auxiliary shaft 28,having at either end thereof pinions 29 meshing with pinionS 30' on the ends of the shafts 26 and 27, so that in effect the shafts 26 and 27 are one shaft. The scavenging pistons of the cylinders aremthus connected in pairs, so' that a movement imparted to one of the pistons of the pair by the operation of the piston of its engine cylinder will be imparted to the other piston of the same pair. rlhe purpose of this will be more .obvious in describing the operation. These crank shafts of the scavenging pistons are preferably set at 1,50 degrees, so that when the scavenging piston is at its outermost limit of movement vthe crank of its crank shaft will be in aloc ice

lili

crank shaft rocks back and forth under the movement of the pistons and one piston of the pair will move in as the other one moves out. In order to more fully understand the operation reference may be had to `the diagrammatic views of Figs. 4 to 7 inclusive.

We will vassume that the piston in cylinder 2 has completed its downward movement on its in-take stroke. On its upward movement it will be moving on its compression stroke, thereby tending to compress the charge therein. This compression stroke: will be about half way completed-when the compressed charge will commence to force the scavengingpistorr 16 of this cylinder outward. The outward movement of the scavenging piston 16 will cause an inward movement of the scavenging piston 16 in cylinder 43, the piston of this cylinder moving up- ;,ward on its exhaust stroke, so that as the upward movement of the piston of cylinder 3 forces the exploded gases up, the scavenging piston 16 will force them horizontally and out of the exhaust port, and by the time the piston of cylinder 3 has reached. the uttermost limits of its upward movement the piston 16 will have likewise reached the uttermost limit of its inward movement, so that theexhaust gases will be forced out and the explosion chamber and cylinder thoroughly cleaned, ready for a fresh charge to be drawn in.' The piston of cylinder 2 moving up on its compression charge, the piston of cylinder 1 will be moving down on lts explosive stroke and the piston of cylinder 4 will be moving down on its intake stroke. It is thus seen that on each compression move- .ment of the piston of one 0f the engine cylinders the scavenging piston of that cylinder will be moved outward and thereby move the scavenging piston of the other of the pair of cylinders inward during the upward move-V ment of its piston on the exhaust stroke. Of course, after the scavenging piston has been moved outward by the compression stroke of the piston of its cylinder it will have no further movement until after the explosion has taken place, and, in fact,-until its twin piston will be moved outward by the compression of the charge in its twin cylinder. The suction stroke, of course, will not cause the scavenging pistonsto move inward, so'

that these pistons remain stationary except when they are forced inward by the compression'of a `charge in the opposite cylinder of the pair. By this arrangement the scavenging of the engine is accomplished without v(the unnecessary absorption of any of the powerv of the engine and without there ever being any danger of the scavenging pistony moving against the explosion of the engine or buclr1ng.the engine. The scavenging pistons are not connected to any drlven member of the engine and receive their movement only by the compression of the Y from the main shaft 6 thereof. For accomplishing this, upon the end "of the engine frame 5 I mount an inclosing casing-3l in which is arranged a driving pinion 32 directly mounted on the main shaft 6. A second casing 33 is mounted at the ltop of the air-cooling jacket of the first cylinder and mounted on the cam shaft which projects into this casing is a pinion 34. Passing over these respective pinions is a silent drive belt 35, which also passes over an idler pinion 36 mounted in the casing 31 and thereby drives the shaft 20a from the main driving shaft. For the purpose of tightening the belt 35 I provide av roller 36 which `bears against the same and which is mounted on an adjustable stem '37 adjustable from the ex- WhileI have shown and described one embodiment of my invention, it will be understood that various changes may be made therein and the invention embodied in other constructions withoutl departing from the spirit thereof as set forth in the' appended claims.

Having thus described my invention, what I claim as new and desire to secure by Ixetters Patent, is

1. In an explosive engine, the combination with a pair of engine cylinders and pistons operating therein, p of auxiliary scavenging means for said cylinders operated by the compression of a charge in each cylinder for forcing out the products of combustion from `the-other. l

2. In an explosive engined the combination with a pair of engine cylinders, of pistons operating therein, each cylinder being provided -with 4an explosionch-amber, and

-auxiliary means operated by the Compres- The cam shaft 20aof the engine is driven A tion with a pair of engine cylinders and v pistons therefor, of a pair of supplemental cylinders forming explosion chambers for said cylinders, pistons operating in said explosion chambers, and means operated by the lcompression of a charge in each of the engine cylinders .for forcing inwardly the piston of the explosion chamber of the opposite yengine cylinder for clearing said chamber ofthe products of combustion after an explosion has taken place.

4. In an explosive engine, the combination with a pair of engine cylinders and pistons operating therein, of a cylinder angularly disposed with respect to the engine cylinder at the top of each of said engine cylinders and forming an explosion chamber, and means in each "of said chambers operated by thecompression of a charge in the opposite engine cylinder for forcing out the products of combustion after an explosion has taken place.

5. In an explosive engine, the combination with a pair of engine cylinders, of a cylinder angularly disposed With respect to Jthe engine cylinders at the top of cachengine cylinder and forming an lexplosion chamber, horizontally disposed intake and outlet valves in the head of each of said explosion chambers, and means operated by the compression of a charge in each engine cylinder for forcing out of the opposite explosion chamber the products of combustion.

. 6. In an explosive engine, the combination with a pair of engine cylinders and pistons operating therein, of a pair of cylinders mounted. above said engine cylinders angularly disposed With respect thereto and forming explosion chambers, scavenging pistonsoperating in said explosion chambers,

v and operated by the movement of one moved by the compression of a charge in the' cylinder, and means operated by one scavenging piston for moving the opposite one.

8. In anv explosive engine, the combination with a pair of engine cylinders, of pistons operating therein, each of said cylinders having an explosion chamber, scav en ng pistons operating in said explosion chambers, andmeans operated by the 'compression of a charge in each engine cylinder for moving the scavenging piston of the opposite engine cylinder in a scavenging direction only on the movement of its corresponding engine piston on its exhaust stroke.

9. In an explosive engine, the combination with a pair of engine cylinders, of pistons operating therein, each cylinder being provided with a cylinder disposed angularly with respect thereto forming an explosion chamber at the top thereof, pistons operating in said cylinders for scavengmg the gases of an exploded charge, cranks-connecting said scavenging pistons together and disposed at such f'an angle that When.th e scavenging piston is at the outermost l1m1t of its stroke the crank and piston rod form a straight line and operating means for said explosion chamber pistons permitting `them to remain stationary at the outermost limit of their strokes during the explosion movement of their corresponding engine pistons.

10. In an explosive engine, the combination with a pair of engine cylinders and pistons therefor, of an explosion chamber for each of said cylinders, auxiliary means for scavenging the exploded charge in said explosion cylinders, operated by the compression of a charge in the opposite engine cylinder, and in-take and exhaust valves arranged in said explosion chambers angularly moving With respect to the engine cylinders. A

l1. In an explosive engine, the combination with a pair of engine cylinders and pistons therefor, of an explosion chamber angularly disposed With respect thereto for each of said cylinders, auxiliary means for scavenging the said chambers of the explosion charge operated by the movement of the piston of the opposite engine cylinder on its compression stroke, andin-take and exhaust valves in one end of each of .said explosion chambers.

12. In an explosive engine, the combina.- tion With a pair of engine cylinders and pistons therefor, of an explosion cylinder'angularly disposed with respect thereto `for each of said engine cylinders, pistons operating in said explosion cylinders for scavenging the explosion cylinders of the products of combustion, operated by the compression of a charge in the opposite engine cylinder, and in-take and exhaust valvesin the heads of each of said explosion cylinders.

13. In an explosive engine, the combination with a pair of engine cylinders and pistons operating therein, of an explosion cylinder for each of said engine cylinders, pistons operating in said explosion cylinders, crank shafts for operating said explosive cylinder pistons operatively independent of the engine crank shaft, the cranks of said shafts being so disposed that When the pistons of the explosive cylinders are at the outermost limits of their stroke the crank shafts will be in a line parallel With the pistonv rods of said explosive cylinder pistons. 14. In an explosive engine, the combination with a pair of engine cylinders and pistons therefor, of an explosion cylinder angularly disposed with respect thereto for each of said engine cylinders, pistons operating in said explosion cylinders, and acrank shaft connecting said `explosion cylinder pistons operatively independent of the' engine crank shaft, said crank shaft having its cranks so disposed that when the piston is at the outermost limits of its stroke the piston rod thereof and the crank of the 13o crank shaft will be in a straight line, the piston of one explosive cylinder being moved inward by the compression of a charge in the opposite engine cylinder.

15. In an explosive engine, the combination with a plurality of cylinders and pistons operating therein, each of said cylinders .having an explosion chamber, of auxiliary scavenging pistons operating in said explosion chambers, and a crank shaft 0peratively independent of the crank shaft of the engine for operating said scavenging pistons.

16. In an explosive engine, the combination with a plurality of cylinders-01Tl pistons havinganv unvariable stroke operating therein, and means operated bythe compression of a charge in one cylinder for forcing out of the other cylinder the products of V combustion.

A17. In an explosive engine, the combmation with a pair of engine cylinders, of pistons operating therein and a pair of auxiliary pistons, the compression of a charge in one engine cylinder operating one of said auxiliary pistons and causing the'same to HENRY H. CUTLER.

Witnesses M. L. MYERS, ANNA E. CUTLER. 

